Insteon

Insteon is a system for connecting lighting switches and loads without extra wiring.

Insteon is a dual-band mesh home area networking topology employing AC-power lines and a radio-frequency (RF) protocol to communicate with devices.

It is a home automation networking technology designed to enable devices, such as light switches, thermostats, motion sensors, etc. to be networked together using the power line, radio frequency (RF), or both. All INSTEON devices are peers, meaning each device can transmit, receive, and repeat any message of the INSTEON protocol, without requiring a master controller or routing software.